D.H.
Hi, I have a daughter that is almost 20 months old, and we had breathable mesh bumpers from day 1. Gabby is very tall and she hopped out of her crib with no help from the bumpers so about 2 months ago i guess, we bought the tent from One Step Ahead. We have a crib with a higher back but we jerry-rigged and it works bc it's mesh to protect their arms and feet and it also keeps her IN the crib bc I'm not ready to convert her crib and drop the one rail. So you may want to skip the breathable bumper all together if you think she is going to take flight :). Good luck!